A system for removing acid gases from a cracked gas

Abstract

This invention discloses a system for removing acidic gases from pyrolysis gas, comprising an atomizing tank, a liquid tank, an absorption tank, a regeneration tank, and a heat exchanger connected by pipelines. The pyrolysis gas inlet pipe connects to an atomizing disc inside the atomizing tank. The liquid outlet pipe at the bottom of the atomizing tank connects to the rich liquid inlet of the heat exchanger, and the gas outlet pipe at the top extends below the liquid surface of the absorbent in the liquid tank. The liquid inlet pipe at the bottom of the liquid tank connects to the liquid inlet of the atomizing disc, and the gas vent pipe at the top connects to the gas inlet of the absorption tank. The gas outlet of the absorption tank connects to the pyrolysis gas outlet pipe, the liquid inlet pipe connects to the lean liquid delivery pipe, and the liquid outlet pipe connects to the rich liquid inlet of the heat exchanger. The lean liquid outlet at the bottom of the heat exchanger connects to the lean liquid delivery pipe, and the rich liquid pipe and lean liquid pipe at the top connect to the top and bottom of the regeneration tank, respectively. The top of the heat exchanger and the regeneration tank are respectively connected to the exhaust port and the gas outlet, which are connected to the acidic gas outlet pipe. This invention combines with ionic liquids, does not employ an alkaline washing process, does not generate waste alkaline liquid, centrally recovers acidic gases, and has no external discharge of waste gas or waste liquid.

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